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Guide to Navigating the G Cup Maze

Navigating the world of bra sizing can be a complex task, particularly when it comes to sizes such as the G cup. If you wear a G cup bra, you’ve probably experienced inconsistencies in fit depending on where you shop. You may have even been fitted into a smaller cup size with a larger band, simply because that was the largest size the store offered. Perhaps, you’ve just been correctly sized and are keen to venture into your newfound sizing universe. Or maybe, you’re on a quest for a better-fitting bra because your current one just isn’t doing the job.

As experts in the field of luxury lingerie for sizes ranging from 26-34 DD-HH, we have a wealth of knowledge and tips to share to help you find the right size, and the ideal bra in that size!

Understanding the Intricacies of Bra Sizing

One of the primary aspects to understand is that the term “G cup” does not represent a fixed size. In fact, a G cup only has meaning when considered alongside a band size. The capacity of a 28G bra is vastly different from a 32G bra size.

Our in-depth explanation on sister sizing provides a comprehensive understanding of this concept. Essentially, if the cup size remains constant, then the volume of the bra increases or decreases with each corresponding band size change. For instance, a 34G bra is both one cup and one band size larger than a 32G. This information can be a game-changer when shopping online and deciding to exchange a bra. Many mistakenly believe that keeping the “G cup” constant would only alter the band size.

Inches and the G Cup

Another way to define a “G cup” is by taking measurements with a tape measure. Measure the size around your ribcage (underbust) and then around the fullest part of your bust (overbust).

A G cup generally represents an 8 or 9 inches difference between the underbust and overbust measurements. In UK sizing, which includes an FF cup size, a 9 inches difference would indicate a G cup. Other brands that don’t use FF cup might define a G cup as an 8 inches difference. This further emphasizes the importance of understanding a brandโ€™s sizing system before purchasing.

However, finding the perfect bra is more than just a numbers game. Numerous factors, including your breast shape, personal comfort, and other aspects, play a significant role in determining your final size. The key isn’t about finding a predefined size, but rather focusing on finding a piece of lingerie that makes you feel amazing.

The Difference between US and UK G Cups

An important distinction to remember is that a UK G cup differs significantly from a US G cup. Depending on the brand you’re purchasing from, there could be up to two whole cup sizes difference.

Many brands catering to the DD+ segment (including and beyond G cups) are based in the UK and adhere to UK sizing. It’s always beneficial to double-check the size chart when shopping online to ensure you’re referring to the correct system and avoid any sizing errors. Our international bra size chart can be a helpful tool for comparison.

To further complicate matters, some US sizing systems transition directly from D to DD, then DDD, and finally DDDD. If we were to follow alphabetical order without any repetitions, a G cup would equate to DDDD. However, once you reach this size, it might be advisable to shop with a specialist brand, most of which follow alphabetical sizing even in the US system.

high-end G cup bra
Where does G Cup stand in the Size Spectrum?

Within the industry, G cup is typically where patterns undergo modifications. A design might work for the standard A-D sizes, then be adjusted for DD-G, and further adapted for GG+. However, very few brands cover the entire size spectrum. Most brands specialise in a particular segment to ensure their customers receive the best fit and design for their size.

It’s easy to assume, especially when shopping in mainstream stores, that a G cup represents the largest size available. However, sizes extend far beyond G, reaching up to L, LL, or M. In today’s world, the DD-G cup segment is more of a midpoint in the range and is exceedingly common. Also, remember that cup letters are always associated with band sizes – so a 30G will be significantly smaller than a 38G.

What about GG?

No, that’s not a mistake – GG is simply the next size up from G in UK sizing. While not all bra sizes use double letters, a few do after DD. The pattern for double letters follows this sequence:


In Conclusion

Bra sizing is a tool to assist you in finding the best fitting garment. Even though different systems are in use across the industry, what matters most is your ability to discern what works best for you, and what to be mindful of when shopping for new styles.

While a “G cup” may not signify a definite size, by measuring your underbust and overbust difference, understanding the signs of a well-fitting bra, and recognizing the sizing system being used, you’re on the right path to discovering your perfect bra.

For any questions about sizing or for assistance in determining the right fit, feel free to reach out to us. Our expert fitters will be more than willing to help guide you through your fitting journey.

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